• Floodplain Maps- Search FEMA 
• Location of Sewer Laterals
• Tract Maps for Individual Parcels

• Commercial Water/Wastewater Billing Inquiries
• Cross Connection Control (Backflow Prevention System)
• Development Forms Index 
•  Encroachment Permits
• Flood Plain Management and Drainage
  • Floodplain Maps- Search FEMA
• Grading Permits
• Land Development Conditioning, Plan Checking, and Permitting
• Location of Existing Facilities and Service Requirements
• Map Recordation, Surveying Information, and Subdivision Processing
• Public Works Department User Fees Summary
• Road Design and Construction Standards (2018)
•  Stormwater Quality / LID/ NPDES

The City of Thousand Oaks participates in the Ventura Countywide Stormwater Quality Management Program.  Land Development stormwater quality guidelines are generally governed by use of the “Ventura County Technical Guidance Manual (TGM) for Stormwater Quality Control Measures”.  To access the latest errata update version of the TGM, please click here. 

• Storm Drain System Master Plan
  • Hydrology Map #1 [PDF] (5.62MB)
  • Hydrology Map #2 [PDF] (4.66MB)
  • Hydrology Map #3 [PDF] (4.13MB)
  • Hydrology Map #4 [PDF] (6.22MB)
  • Hydrology Map #5 [PDF] (6.77MB)
  • Hydrology Map #6 [PDF] (6.82MB)
  • Hydrology Map #7 [PDF] (5.19MB)
  • Hydrology Map #8 [PDF] (1.75MB)
  • Vol 1 - Hydrology Deficiency Report [PDF] (499.3KB)
  • Vol 2 - VCRAT Model [PDF] (1.41MB)

•  Trash Enclosure Approvals and Standards 
• Water and Wastewater Permits
• Wastewater Design and Constructions Standards (1979)
• Water Design and Construction Standards